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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

42902 results found.

  1. GRB 080319B: second epoch imaging from Canarias (correction to GCN7469)
  2. GRB 080319C: KAIT OA observations
  3. GRB 080320 - SDSS Pre-Burst Observations
  4. GRB 080320: Swift detection of a burst
  5. GRB 080319B: optical observations
  6. GRB 080319C - SDSS Pre-Burst Observations
  7. GRB 080319A SDSS Pre-Burst Observations
  8. Swift-BAT trigger 306829 is IGR J16479-4514
  9. GRB080319B - SDSS Pre-Burst Observations
  10. GRB 080319B: RAPTOR observations of a naked eye burst
  11. GRB 080319A: Swift-XRT Team Refined Analysis
  12. GRB 080319B, Swift-BAT refined analysis
  13. GRB080319B: Prompt PROMPT Detections
  14. GRB 080319C: Swift-XRT Team Refined Analysis
  15. GRB 080319B: Swift-XRT Team Refined Analysis
  16. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  17. GRB 080319C: AGILE-MCAL observation of the prompt emission
  18. GRB 080319B: Hobby-Eberly Telescope Spectroscopy
  19. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  20. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  21. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  22. GRB 080319B: TORTORA synchronous observation
  23. VLT/UVES redshift of GRB 080319B from FeII fine-structure lines
  24. GRB 080319A/B/C: INTEGRAL SPI-ACS light curves available
  25. GRB 080319B: Enhanced Swift-XRT position
  26. GRB 080319A: Enhanced Swift-XRT position
  27. GRB 080319A, Swift-BAT refined analysis
  28. GRB 080319B: REM early data
  29. VLT/UVES redshift of GRB 080319B
  30. GRB 080319C: Early Super-LOTIS Observations
  31. GRB 080319C: Swift detection of a burst with an optical afterglow
  32. GRB 080319C: KAIT OA candidate
  33. GRB 080319A: REM observations
  34. GRB 080319B: Change in power law decay index
  35. GRB 080319B: Gemini-South Spectroscopy
  36. GRB 080319A: optical observations at the NOT
  37. GRB 080319b: Early IR Imaging from PAIRITEL
  38. GRB080319B Liverpool Telescope optical afterglow candidate
  39. GRB 080319B: Super-LOTIS Detection of a Bright OT
  40. GRB 080319B: REM observations
  41. GRB 080319B: KAIT OA
  42. GRB080319A: P60 Optical Afterglow Observations
  43. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  44. GRB 080319A: Swift detection of a burst
  45. Swift Trigger 306745 is not a GRB
  46. Swift Trigger 306616 is not a GRB
  47. GRB080310, LBT and MDM photometry
  48. GRB080315: Bok Optical Observations
  49. Swift/UVOT observations of GRB 080315
  50. Swift trigger 306323: Swift-BAT/XRT refined analysis
  51. SAX J1818.6-1703: Swift detection (trigger 306379)
  52. GRB 080315: Optical observations
  53. GRB 080315: TAROT Calern observatory optical observations
  54. GRB 080315: Swift detection of a possible burst
  55. GRB080310, unusual slow decay in the optical
  56. GRB080310 : Optical observations by LOAO and Lulin
  57. GRB 080310: ROTSE-III Observations of Optical Counterpart
  58. GRB080310: Optical observation by MITSuME telescope
  59. GRB080310, optical observations with the LBT
  60. GRB 080229A: GAO 150cm telescope Optical Observation
  61. GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
  62. GRB 080307: NIR upper limit
  63. GRB 080229: NIR upper limit
  64. GRB 080310: early RAPTOR multicolor observations
  65. GRB 080310, Swift-BAT refined analysis
  66. GRB080210: optical observations
  67. GRB080307: optical upper limit
  68. GRB 080310: Swift-XRT refined analysis
  69. GRB 080310: Swift/UVOT Refined Analysis
  70. GRB 080310: Redshift from Keck/DEIMOS Spectra
  71. GRB 080310 - SDSS Pre-Burst Observations
  72. GRB 080310: Enhanced Swift-XRT position
  73. GRB 080310: RRM optical photometry with the VLT
  74. GRB080310, detection of break in optical
  75. GRB 080310: VLT/UVES spectroscopy
  76. GRB080310, optical observations with LBT
  77. GRB 080310: Lick/Kast Spectroscopy
  78. GRB080310: Super-LOTIS suggestion of brightening
  79. GRB 080310, SMARTS optical/IR afterglow observations
  80. GRB 080310: REM observations
  81. GRB 080310: Magellan redshift
  82. GRB 080310 afterglow candidate (correction to UT time)
  83. GRB 080310: Swift detection of a burst with optical afterglow
  84. GRB 080310 afterglow candidate
  85. GRB080307 BOAO optical afterglow observation - detection of a possible OT
  86. GRB 080307: Swift-XRT Team refined analysis
  87. GRB 080307: Swift/UVOT Upper Limits
  88. GRB 080307, Swift-BAT refined analysis
  89. GRB080307 - SDSS Pre-Burst Observations
  90. GRB 080307: TNT optical observation
  91. GRB 080307: Gemini-N i-band observations - candidate afterglow
  92. GRB 080307: BOAO imaging - retraction and new limit
  93. GRB 080307: retraction of UVOT candidate
  94. GRB 080307: Enhanced Swift-XRT position
  95. GRB 080307, Preliminary Swift-BAT refined analysis
  96. GRB 080307: Swift detection of a burst
  97. VLA possible radio detection of GRB 080229
  98. GRB 080303: Swift/UVOT follow-up of afterglow detection
  99. GRB 080303, Swift-BAT refined analysis
  100. GRB 080303: Rapid PROMPT Detections

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